Clippy from RJL Software*
I'm dying to install this on certain people's computers, but I'd better not. Sigh.
OMG! They have a ton of prank software. Some of it is truly inspired, but most of it is just goofy. Also, I'm not sure I would ever see the need for distributing "I was pranked!" t-shirts after said prank, but if you're not like me, you can stock up here.
Anyhow, I probably won't post until next Monday. I have to get through Thanksgiving with the fam and a friend's wedding first. Urk. Oh, wait! At least I have a Pub Quiz tonight to look forward to.
* As mentioned on LMNOP's This Week in Internet post.